Bartoline Stain Blocker Spray 400 ml

Bartoline Stain Blocker Spray is a solvent-based aerosol presented for blocking stains on interior walls, ceilings, plaster, windowsills and woodwork. It is described as usable as a primer or topcoat, with a smooth finish and fast-drying formula.

At a glance

A 400 ml aerosol listed for interior walls, ceilings, plaster, windowsills and woodwork.
The listing says it blocks mould, mildew, water damage, grease, rust, smoke and pen marks.
Can be used as a standalone finish or a base coat before painting, according to the listing.
The stated solvent-based formulation and aerosol application suit small-scale stain treatment without brushing on a conventional primer.

Price

£2.86Save 15%

Reference price: ~~£3.37~~

Price checked: 12 Nov 2026

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Often bought together

SIRAMICO COATINGS Anti-Mould Paint, 10 years Resistant– 1 Litre | 10 year anti-mould resistant paint for bathrooms, kitchens,

£16.98

Stain Blocker & Multi Purpose Primer 500ml

£11.49

Pros and cons

Pros

Versatile listed stain coverage includes damp marks, grease, mould and smoke as well as rust and pen marks.
Suitable for several common interior surfaces, including plaster and woodwork.
Primer or topcoat use gives buyers a choice between leaving it as a finish and painting over it.

Cons

A single 400 ml can may be limiting for larger areas, and the listing supplies no quantified coverage figure.

Technical specifications

14 specifications

Identity and formulation
Brand	Bartoline
Base material	solvent-based
Coating description	Solvent-based, aerosol spray, smooth finish, clear or lightly tinted coating for stain blocking, suitable for use as a primer or topcoat.
Finish	smooth
Colour	Stain Blocker

Use and surfaces
Recommended uses	Interior: Walls, Ceilings, Plaster, Windowsills, Woodwork
Compatible materials	Wood, Plaster, Concrete (for walls and ceilings)
Surface recommendation	Walls, Ceilings, Plaster, Windowsills, Woodwork
Special feature	Mold Resistant
Coverage	High coverage

Pack and dimensions
Size	400 ml
Number of items	1
Dimensions listed	6.5 x 6.5 x 20 centimetres
Weight listed	420 Grams

What to know before buying

Listing details to confirm

The listing describes the product as matt in the title but gives a smooth finish in its details. Its coating description says clear or lightly tinted, while the title does not specify colour, so check the expected appearance before applying it where the finish will remain visible. The listing also describes damp and mould stain blocking, which should not be read as evidence that it repairs the underlying cause of damp or mould.

Who is it for?

A good fit for

DIY users treating isolated interior stains before repainting.
Buyers needing an aerosol stain blocker for listed surfaces such as plaster, ceilings or woodwork.
Small decorating repairs where a primer or standalone topcoat may be useful.

Less suited to

Large projects where a quantified coverage rate is needed to estimate materials.
Buyers who require a confirmed opaque white or specifically matt finish without checking the product details.

Bartoline Stain Blocker Spray 400 ml · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 118 ratings

5 stars74%74%
4 stars16%16%
3 stars7%7%
2 stars1%1%
1 star2%2%

Customer feedback highlights perceived effectiveness and coverage, including reports of blocking mould before painting and covering a yellow damp mark. Positive comments also mention quality and value. This feedback is relevant to the listing’s intended use on interior stains, but it does not establish a coverage rate or guarantee results on every surface. The overall rating pattern is mostly positive, though a smaller share of ratings are lower, and ratings alone do not explain the reasons.

Positive themes

Customers describe the stain blocker as effective, with positive mentions of coverage, quality and value.

Frequently asked questions

What stains does Bartoline Stain Blocker Spray claim to cover?

The listing says it blocks mould, mildew, water damage, grease, rust, smoke and pen marks.

Which surfaces is it intended for?

Listed interior surfaces include walls, ceilings, plaster, windowsills and woodwork. The compatible-material details also name wood, plaster and concrete for walls and ceilings.

Can it be left as the final coat?

The listing presents it for use either as a standalone finish or as a base coat before painting.

Is the finish definitely matt and opaque white?

That is not clear from the listing. The title calls it matt, while the details say smooth and describe the coating as clear or lightly tinted. Check the product appearance if it will remain exposed.